arm64: hugetlb: enable __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE

It is better to use huge page size instead of PAGE_SIZE for stride when
flush hugepage, which reduces the loop in __flush_tlb_range().

Let's support arch's flush_hugetlb_tlb_range(), which is used in
hugetlb_unshare_all_pmds(), move_hugetlb_page_tables() and
hugetlb_change_protection() for now.

Note,: for hugepages based on contiguous bit, it has to be invalidated
individually since the contiguous PTE bit is just a hint, the hardware may
or may not take it into account.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Reviewed-by: Muchun Song <[email protected]>
Reviewed-by: Catalin Marinas <[email protected]>
Cc: Barry Song <[email protected]>
Cc: Joel Fernandes (Google) <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Mina Almasry <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: William Kucharski <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions